Final answer:
When a new medical facility opens, physicians most likely hold an open house to introduce the center to the community. This allows people to learn about the services and meet the healthcare professionals.
Step-by-step explanation:
When a new facility opens, physicians are likely to hold an open house. An open house is an event where guests are invited to visit a business or institution to learn more about it, meet the staff, and get a tour of the facilities. This type of event is appropriate for a new medical facility as it allows the community to meet healthcare professionals and learn about the services provided. Physicians typically would not hold an auction, symposium, or award ceremony to mark the opening of a facility, as these do not serve the same purpose as an open house when it comes to introducing a new healthcare center to the public.